fix(domain): ImportSession::new() generates own ID, add from_persistence()

crates/domain/src/models/import_session.rs

@@ -15,11 +15,22 @@ pub struct ImportSession {
     pub expires_at: NaiveDateTime,
 }
 
+pub struct PersistedImportSession {
+    pub id: ImportSessionId,
+    pub user_id: UserId,
+    pub parsed_file: Option<ParsedFile>,
+    pub field_mappings: Option<Vec<FieldMapping>>,
+    pub row_results: Option<Vec<AnnotatedRow>>,
+    pub created_at: NaiveDateTime,
+    pub expires_at: NaiveDateTime,
+}
+
 impl ImportSession {
-    pub fn new(id: ImportSessionId, user_id: UserId, created_at: NaiveDateTime) -> Self {
+    pub fn new(user_id: UserId) -> Self {
+        let created_at = chrono::Utc::now().naive_utc();
         let expires_at = created_at + chrono::Duration::hours(24);
         Self {
-            id,
+            id: ImportSessionId::generate(),
             user_id,
             parsed_file: None,
             field_mappings: None,
@@ -28,4 +39,16 @@ impl ImportSession {
             expires_at,
         }
     }
+
+    pub fn from_persistence(p: PersistedImportSession) -> Self {
+        Self {
+            id: p.id,
+            user_id: p.user_id,
+            parsed_file: p.parsed_file,
+            field_mappings: p.field_mappings,
+            row_results: p.row_results,
+            created_at: p.created_at,
+            expires_at: p.expires_at,
+        }
+    }
 }